DURABLE SCREW SUCTION CUPS: By tightening the nut, it would pull up the center of the suction cup, the tighter the nut, the stronger the suction.. Compared to the 25% fall off rate of the old regular suction cups, the improved suction cups has only about 5% fall off rate. Suction cups that can hold up to 10 LBS.DETACHABLE FEED TRAY: Designed with a detachable feed tray that makes it easy and convenient for you to clean the bird feeder and refill the feeder with fresh seed without removing the entire feeder. Provides a healthy and clean feeding condition for the birds. The tray is divided into 2 compartments you can fill with 2 kinds types of seeds at once to attract different breeds of birds.MOISTURE REMOVAL SYSTEM: Features precise laser-drilled drainage holes. this bird feeder effectively drains water in the tray after rainy and snowy days, which keeps the tray dry and prevents mold. the holes are designed big enough to drain out the water, but small enough that seeds dont pass through.CLEAR VIEWING DETAIL: Large suckered window bird feeders provides spectacuar view with clear acrylic and large opening Design, watch cardinals, blue jays, finches,small birds, juncos, chickadees, nuthatches, titmice, sparrows and more enjoy themselves through this completely see through, transparent feeder.PERFECT GIFT TO DELIGHT ANY AGE: Gift hour of amusement to anyone from young children to seniors living in retirement communities. Not only is house shape window bird feeders great backyard birding gift, bird lover gifts, but its also endless, unique gifts for parents, dads, moms and kids. Its like watching a nature channel, but so much better because its live

Note:Shipping time is 5-12 days